&pound;24.99 upgrade - install fresh copy?

I'm considering the £24.99 upgrade to Windows 8 (from Windows 7). If I buy and download this, can I burn a bootable install disc, and am I able to use this to install Windows 8 from scratch?

I need this to be possible because I spring clean my PC periodically by formatting the C: drive and reinstalling Windows, and I don't want to always have to install Windows 7 and then upgrade it to Windows 8.

Thanks, woody. Would it definitely not work if I only had the £25 upgrade? I don't really think Win 8 is worth more than this, so probably won't upgrade in that case. But I remember back to when I got a Windows 95 upgrade and I simply had to put the first Win 3.11 floppy in part way through the installation to validate that I was eligible for upgrade. I could live with putting the Win 7 disc in during 8 installation, but I just don't want to have to fully install Win 7 and then upgrade each time.

Would it definitely not work if I only had the £25 upgrade - I have just paid £25 plus vat £29! - You may think its not worth that.I don't know how much it checks but try google some one may have tried.
If you are thinking its a lot -don't bother and look at the reviews.
It is unlikely i will use it for more than a test bed - even vista is better but that is only my opinion.
I do have a selection of OS's on this test bed and put win 8 pro on top of win 8 with no problems - but the software MAY have looked for other OS on my other HD's

When you download the upgrade (£24.99) you get the option of either installing it immediately or saving an ISO file to burn to a DVD for use on a different partition or for reinstallation at a later date.

The only unique thing about the upgrade is that it is sold as a replacement for the operating system that was installed on your computer when the upgrade adviser was run. So if you had a 32 bit os then the upgrade version you are sold is only a 32 bit version.